webpack/lib/ExtendedAPIPlugin.js

Packs CommonJs/AMD modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support loaders to preprocess files, i.e. json, jade, coffee, css, less, ... and your custom stuff.

/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author Tobias Koppers @sokra
*/
var ConstDependency = require("./dependencies/ConstDependency");
var BasicEvaluatedExpression = require("./BasicEvaluatedExpression");

var NullFactory = require("./NullFactory");

function ExtendedAPIPlugin() {
}
module.exports = ExtendedAPIPlugin;

var REPLACEMENTS = {
	__webpack_hash__: "__webpack_require__.h"
};
var REPLACEMENT_TYPES = {
	__webpack_hash__: "string"
};
ExtendedAPIPlugin.prototype.apply = function(compiler) {
	compiler.plugin("compilation", function(compilation, params) {
		compilation.dependencyFactories.set(ConstDependency, new NullFactory());
		compilation.dependencyTemplates.set(ConstDependency, new ConstDependency.Template());
		compilation.mainTemplate.plugin("require-extensions", function(source, chunk, hash) {
			var buf = [source];
			buf.push("");
			buf.push("// __webpack_hash__");
			buf.push(this.requireFn + ".h = " + JSON.stringify(hash) + ";");
			return this.asString(buf);
		});
		compilation.mainTemplate.plugin("global-hash", function() {
			return true;
		});
	});
	Object.keys(REPLACEMENTS).forEach(function(key) {
		compiler.parser.plugin("expression "+key, function(expr) {
			var dep = new ConstDependency(REPLACEMENTS[key], expr.range);
			dep.loc = expr.loc;
			this.state.current.addDependency(dep);
			return true;
		});
		compiler.parser.plugin("evaluate typeof "+key, function(expr) {
			return new BasicEvaluatedExpression().setString(REPLACEMENT_TYPES[key]).setRange(expr.range);
		});
	});
};